I would have to go out on a limb here and say, the best way to know if your rod and bearings and crank are ok is to disassemble. As to bore or hone, try honning it, if you can't take the scratches or nicks out, then you will need to bore. Be sure not to hone past your max clearance tollerance for piston to cyl. wall. As to replacing the piston/pistons, if you can find one new that is the same brand and composition as the other 7, then get that, if not, consider replacing all of them. I would do that, just to be safe anyway. If you have a failure on one, how long till another fails? Your gonna have to tear it down anyways, you might as well do it right.

Check all you tolerance for crank and cam, maybe look at your valve train while your there. Don't know what your $$ situation is, but getting your block bored 0.030 over would not be a bad idea, just to be safe.

JMO